That is the point at issue.its not exporting its laws. It’s enforcing its own laws within its own borders which the eu , or any country, is entitled to do.
the eu is perfectly entitled to ensure products sold within the eu comply with its only health & safety laws for example. If that was not a basic premise what would be the point of having any standards if they could just be ignored?
For example, the EU are currently adopting an extreme version of the precautionary principle under which any product subjected to any substance which can cause cancer even only at huge concentrations cannot be sold in the EU. But hundreds of products fall into this category e.g. alcohol. Whether this policy is legal under WTO rules or is so onerous as to act as a non tariff barrier is moot. Hence the actions to settle this point.